Salixx
Songster
Update:
I had wanted to try and re-home him. He unfortunately flogged my 5 year old daughter today while she was outside with my husband. Scratched up the back of her legs. My husband said he is going to kill him now so I guess we are having chicken stew.
That's so sad, I'm sorry. It hasn't happened to me yet, but I would be so bummed out if one of my favorite boys suddenly became aggressive after being sweet.
Jefferson likely already had aggressive tendencies - most animals fall on the "fight, flight or freeze" spectrum. I think there's a good chance the leaf blower was a catalyst for the "fight" coming to the forefront. There are certain, nearly universal, things in animal behavior and one of them is that aggression can beget aggression. Your mother unintentionally made herself and, by proxy, other humans a potential threat to the flock and he responded in a natural (but highly undesirable) way.
I think your husband made the right call. Jefferson had an undesirable and innate trait. It would have been highly valuable in another setting (i.e. chasing off a cat) but humans should be off limits. A bird that can make the distinction would make a better flock protector and father, should you choose to add another Roo.
The only other option I see if if you can find a rooster sanctuary. They exist, some of them even specialize in rehabbing aggressive roos including birds previously used in cock fighting. Unfortunately, they are also usually overwhelmed with unwanted roos so it might be a crap shoot.
It would also help if you could find an alternative for your mother. Positive reinforcement works wonders on all sorts of animals(sometimes with undesirable results). Give them their treats when they aren't on the porch. Don't ever give them treats while they are on a porch or from the porch. If the porch equals food, they'll be all over it. If the porch is a boring place devoid of food, it's much less appealing.
I don't have children so I can be a little more tolerant of my aggressive boys and let them get to butchering size. I am the only one that tends the flock as well. I have use the restraint method - either gently pinning or picking up and holding them against my body for a while. It's made them afraid of me but not complete terror. They will come to me for food but if I approach them they run away in terror.